I discovered this while looking into the game files:

<PlayerTypes Number="11">

    <Type Name="Default" Value="0" />

<Type Name="Scrums" Value="1" />

        <Type Name="Lineouts" Value="2" />

        <Type Name="Tackler" Value="3" />

        <Type Name="Runner" Value="4" />

        <Type Name="Passer" Value="5" />

        <Type Name="Kicker" Value="6" />

        <Type Name="Crasher" Value="7" />

        <Type Name="Rucks" Value="8" />

        <Type Name="Goalkicker" Value="9" />

        <Type Name="Playmaker" Value="10" />

    </PlayerTypes>

<Skills Number="14">

    <Skill Name="Command" Value="0" />

    <Skill Name="Passer" Value="1" />

    <Skill Name="Playmaker" Value="2" />

    <Skill Name="Scoring" Value="3" />

    <Skill Name="GoalKicker" Value="4" />

    <Skill Name="TacticalKicking" Value="5" />

    <Skill Name="CrashBall" Value="6" />

    <Skill Name="TackleBreaker" Value="7" />

    <Skill Name="Tackling" Value="8" />

    <Skill Name="BallWinner" Value="9" />

    <Skill Name="DefensiveOrganisation" Value="10" />

    <Skill Name="Scrummager" Value="11" />

    <Skill Name="Jumper" Value="12" />

    <Skill Name="InjuryResistance" Value="13" />

</Skills>

Hope it helps